Light is a type of energy
which our eyes are able to see. It’s a physical phenomenon, characterized by
the radiation of photons which move at 186,000 mph.
A world with no light would
be a world where humans could not see. It would happen if the sun disappeared,
or if a highly contagious virus made us blind in a short time.
What if we all became blind?
How could we live normally?
A blind person is not able
to see, so he has to use his other senses to be able to find his way and to
have a normal life.
The senses of hearing, smell
and touch would become more developed, because they would take over the zones
of the brain responsible for vision.
Blind people also develop their
ability to feel heat and cold which can help them move around. That is
fascinating, isn't it? Without vision, a new universe opens up before us.
Going blind can scare us but if we were born blind
(or in a world without light), becoming someone who can see would also scare us
so it's just a question of adaption.
As something happens, an
image of this event is created in your brain thanks to all your senses. First,
listen to this: https://www.youtube.com/watch?v=zwBCdlFPd2A
You have no problem understanding
this is a crowd of rugby supporters. You have made an image of them as you listened.
Now listen to this: https://www.youtube.com/watch?v=VWS7hxSkd3k
You do not know what it is,
so it is very difficult to form a mental image of it.
Now watch the video: https://www.youtube.com/watch?v=Qh7kQlg9Vzw
You now have an image in
your brain; a blind person however doesn't need a video to make an image in his brain.
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